5pcs Brand New Ready to Use DIN Yoke Valve Inserts. Converts DIN tank valve for use with Yoke regulators. O-ring compatible. Inserted and removed with 8mm hex key (not included). Color: Silver Material: Chrome Plated Copper Size: About 15.6 x 22.5mm Package Contents: 5 x DIN Yoke Valve Inserts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.